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EP2651811B1 - Regenerative leistungsregelung für personenförderer - Google Patents

Regenerative leistungsregelung für personenförderer Download PDF

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Publication number
EP2651811B1
EP2651811B1 EP10860709.4A EP10860709A EP2651811B1 EP 2651811 B1 EP2651811 B1 EP 2651811B1 EP 10860709 A EP10860709 A EP 10860709A EP 2651811 B1 EP2651811 B1 EP 2651811B1
Authority
EP
European Patent Office
Prior art keywords
regenerative drive
power source
electricity
controller
passenger conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10860709.4A
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English (en)
French (fr)
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EP2651811A4 (de
EP2651811A1 (de
Inventor
Guanghua Ma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otis Elevator Co
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Otis Elevator Co
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Publication date
Application filed by Otis Elevator Co filed Critical Otis Elevator Co
Publication of EP2651811A1 publication Critical patent/EP2651811A1/de
Publication of EP2651811A4 publication Critical patent/EP2651811A4/de
Application granted granted Critical
Publication of EP2651811B1 publication Critical patent/EP2651811B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B25/00—Control of escalators or moving walkways
    • B66B25/003—Methods or algorithms therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B23/00—Component parts of escalators or moving walkways
    • B66B23/02—Driving gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B25/00—Control of escalators or moving walkways
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies

Definitions

  • An escalator is one type of passenger conveyor. Escalators have proven useful for carrying passengers between different levels of a building, for example. Typical escalator systems include a plurality of steps that move based upon operation of a motor and drive system.
  • US 2009/058333 A1 discloses an elevating machine control apparatus which controls an inverter to drive an AC motor connected to the inverter with AC power, and energizes a power generation braking resistor to apply a brake during regenerative operation of the AC motor.
  • the apparatus prohibits the elevating machine from starting operating and interrupts power supply to the power generation braking resistor if the DC stage voltage of the inverter has a ripple quantity of a set value or more when the elevating machine is being stopped.
  • JP H11 199148 A discloses an elevator control device which can surely detect the failure of a semiconductor element for regeneration in a regeneration circuit, and can prevent a regeneration resistor from being over-heated.
  • the present invention relates to a device and a method of controlling power associated with a passenger conveyor, and to a passenger conveyor according to the appended claims.
  • An exemplary device for controlling power associated with a passenger conveyor motor includes a regenerative drive that is configured to facilitate providing electricity generated by the motor to a power source when the passenger conveyor is moving.
  • the controller determines when an operating condition of the regenerative drive is outside of a desired range and responsively prevents the regenerative drive from facilitating providing the electricity to the power source, as stipulated in claim 1.
  • Particular embodiments may include any of the following optional features, alone or in combination:
  • An exemplary method of controlling power associated with a passenger conveyor motor includes generating electricity from the motor when the passenger conveyor is moving.
  • a regenerative drive facilitates providing the electricity to a power source.
  • a determination is made when an operating condition of the regenerative drive is outside of a desired range. The regenerative drive is then prevented from facilitating providing the electricity to the power source, as stipulated in claim 8.
  • Particular embodiments may include any of the following optional features, alone or in combination:
  • An exemplary passenger conveyor includes a plurality of steps.
  • a motor is associated with the steps for selectively moving the steps.
  • a regenerative drive is configured to facilitate providing electricity generated by the motor to a power source when the steps are moving.
  • the controller determines when at least one of a current or a temperature of the regenerative drive is outside of a desired range. The controller then responsively prevents the regenerative drive from facilitating providing the electricity to the power source, as stipulated in claim 12.
  • Figure 1 illustrates a passenger conveyor 20.
  • a plurality of steps 22 and a handrail 24 facilitate moving passengers between landings 26 and 28.
  • the example passenger conveyor 20 is an escalator as the landings 26 and 28 are at different vertical positions or elevations.
  • the example passenger conveyor 20 includes a power control device 30 that controls whether a regenerative operating mode is used during selected operating conditions of the passenger conveyor 20.
  • FIG. 2 schematically illustrates an example power control device 30.
  • a passenger conveyor motor 32 selectively causes the steps 22 to move in a desired direction (e.g., up or down) and at a desired speed.
  • the motor 32 operates based upon power provided by a power source 34 such as a conventional power grid.
  • the example of Figure 2 includes a regenerative drive 36 that facilitates providing electricity generated by the motor 32 to the power source 34 in the regenerative mode.
  • the regenerative drive 36 includes an inverter and converter to provide an appropriate interface between the motor 32 and the power source 34 when the illustrated example is operating in a regenerative mode.
  • One example includes a known configuration of the inverter and converter.
  • a controller 40 selectively controls whether the regenerative drive 36 facilitates providing electricity generated by the motor 32 to the power source 34.
  • the controller 40 determines whether at least one characteristic of the regenerative drive 36 is within a desired range. If that characteristic is outside of the desired range, the controller 40 prevents the regenerative drive 36 from facilitating providing electricity from the motor 32 to the power source 34.
  • the characteristic that the controller 40 monitors is the current of the regenerative drive 36.
  • the current will become high enough to generate heat at a level that could be damaging to one or more components of the regenerative drive 36 or other components of the power control device 30.
  • the controller 40 monitors the current of the regenerative drive 36. When that current exceeds a predetermined threshold, the controller 40 disables or prevents the regenerative drive 36 from facilitating providing electricity generated by the motor 32 to the power source 34. This protects the regenerative drive components and other portions of the power control device 30.
  • the threshold current corresponds to the passenger conveyor 20 carrying a load that is approximately 70% of a full rated load for the passenger conveyor 20.
  • Known techniques allow for determining the current corresponding to such a load.
  • a temperature of the regenerative drive Another characteristic of the regenerative drive 36 that can be used by the controller 40 is a temperature of the regenerative drive.
  • This example includes a heat sink 42 that is associated with the regenerative drive 36 to dissipate heat produced during the regenerative mode.
  • the controller 40 in this example determines a temperature of the heat sink 48 and prevents the regenerative drive 36 from operating in the regenerative mode for providing electricity from the motor 32 to the power source 34 when the temperature exceeds a pre-selected threshold.
  • the temperature threshold is selected to correspond to the passenger conveyor 20 being loaded at approximately 70% of a maximum rated load. Given this description, those skilled in the art will be able to determine an appropriate temperature threshold for their particular situation.
  • the illustrated example includes a bypass switch 44 between the power source 34 and the regenerative drive 36.
  • the controller 40 controls the bypass switch to allow current flow between the power source 34 and the motor 32 through the regenerative drive 36 on the conductive lines 46 when the bypass switch 44 is set to a first operating state.
  • the controller 40 changes the operating state of the bypass switch 44 so that the connection between the power source 34 and the motor 32 is along conductive lines 48.
  • the regenerative drive 36 is disconnected from the power source 34 and bypassed so that it is not involved with any power transmission between the power source 34 and the motor 32.
  • the regenerative drive 36 when the regenerative drive 36 is bypassed the motor 32 provides power directly to the power source 34.
  • the controller 40 determines which operative state to place the bypass switch 44 into based upon a direction of movement of the steps 22 of the passenger conveyor 20. In one example, when the steps 22 are moving in an upward direction, the controller 40 controls the bypass switch 44 so that power flows along the conductive lines 46 during a start-up of the passenger conveyor 20. Once the speed of the steps 22 reaches a rated speed, the controller 40 causes the bypass switch 44 to change its operative state so that power then flows along the conductive lines 48 and the regenerative drive 36 is no longer involved in power flow management between the power source 34 and the motor 32.
  • the regenerative drive 36 can be used in the regenerative mode. Once a load on the steps 22 is sufficient to overcome friction, the motor 32 is not necessarily required to move the steps 22 at a desired speed. Under those conditions, the controller 40 causes the bypass switch 44 to connect the regenerative drive 36 and the conductive lines 46 between the power source 34 and the motor 32. In one example, turning on the regenerative drive 36 in this manner occurs when the passenger conveyor 20 is carrying a load that is approximately 30% of a maximum rated load.
  • the controller 40 While the regenerative drive 36 is operating to facilitate providing power from the motor 32 to the power source 34, the controller 40 is continuously monitoring the selected operating characteristic of the regenerative drive 36. Once the temperature or heat of the regenerative drive 36 exceeds the selected threshold (e.g., when the load on the conveyor 20 is greater than approximately 70% of a rated load), the controller 40 causes the bypass switch 44 to disconnect the conductive lines 46 and the regenerative drive 36 and instead to direct power conduction between the motor 32 and the power source 34 along the conductive lines 48. This allows for the regenerative drive to facilitate providing power from the motor 32 to the power source 34 under operating conditions that can be handled by the components of the regenerative drive 36.
  • the selected threshold e.g., when the load on the conveyor 20 is greater than approximately 70% of a rated load
  • a regenerative drive 36 that is configured for a relatively light duty passenger conveyor system to be used with a heavier duty passenger conveyor system without danger of overheating the regenerative drive components and without requiring more expensive regenerative drive components.
  • the illustrated example expands the possible uses of a given regenerative drive configuration. Further, the illustrated example increases the possible number of passenger conveyor systems that can be used in a regenerative mode.
  • the controller 40 continues to monitor the current, heat or both. Once the selected characteristic is within the desired range, the regenerative drive 36 is reconnected between the motor 32 and the power source 34.
  • bypass switch 44 can be controlled to always direct power between the motor 32 and the power source 34 along the conductive lines 48.
  • variable frequency control devices for passenger conveyors require a break resistor while the illustrated example eliminates the need for such a resistor. This provides additional cost savings as it eliminates the requirements for what can be considered a relatively expensive component.
  • the illustrated example selectively utilizes the regenerative drive 36 under selected operating conditions provided that a selected characteristic of the regenerative drive 36 (e.g., current, temperature or both) is within a desired operating range.
  • a selected characteristic of the regenerative drive 36 e.g., current, temperature or both

Landscapes

  • Escalators And Moving Walkways (AREA)
  • Stopping Of Electric Motors (AREA)

Claims (12)

  1. Vorrichtung (30) zum Regeln der Leistung im Zusammenhang mit einem Personenförderermotor (32), umfassend:
    einen regenerativen Antrieb (36), der dazu konfiguriert ist, das Bereitstellen von Elektrizität, die durch den Motor (32) erzeugt wird, an eine Leistungsquelle (34) zu ermöglichen, wenn sich der Personenförderer (20) bewegt; und
    eine Steuerung (40), die bestimmt, wann eine Betriebsbedingung des regenerativen Antriebs (36) außerhalb eines gewünschten Bereichs liegt und darauf reagierend verhindert, dass der regenerative Antrieb (36) das Bereitstellen der Elektrizität an die Leistungsquelle (34) ermöglicht,
    gekennzeichnet durch
    einen Umgehungsschalter (44) zwischen dem regenerativen Antrieb (36) und der Leistungsquelle (34) und wobei die Steuerung (40) den Umgehungsschalter (44) steuert, um zu erlauben oder zu verhindern, dass der regenerative Antrieb das Bereitstellen von Elektrizität an die Leistungsquelle (34) ermöglicht.
  2. Vorrichtung (30) nach Anspruch 1, wobei die Betriebsbedingung einen Strom umfasst und die Steuerung (40) bestimmt, wann der Strom einen Schwellenwert überschreitet, und/oder wobei die Betriebsbedingung eine Temperatur umfasst und die Steuerung (40) bestimmt, wann die Temperatur einen Schwellenwert überschreitet.
  3. Vorrichtung (30) nach Anspruch 2, umfassend einen Kühlkörper (48) im Zusammenhang mit dem regenerativen Antrieb (36) und wobei die Steuerung (40) die Temperatur am Kühlkörper (48) bestimmt.
  4. Vorrichtung (30) nach einem der Ansprüche 1 bis 3, wobei die Steuerung (40) steuert, ob der regenerative Antrieb (36) das Bereitstellen der Elektrizität an die Leistungsquelle (34) abhängig von einer Bewegungsrichtung des Personenförderers (20) bereitstellt.
  5. Vorrichtung (30) nach Anspruch 4, wobei die Steuerung (40) erlaubt, dass der regenerative Antrieb (36) das Bereitstellen der Elektrizität an die Leistungsquelle (34) ermöglicht, wenn die Bewegungsrichtung abwärts verläuft und die Betriebsbedingung innerhalb des gewünschten Bereichs liegt.
  6. Vorrichtung (30) nach Anspruch 5, wobei der gewünschte Bereich der Betriebsbedingung einer Last am Personenförderer (20) zwischen etwa 30 % und etwa 70 % einer vollen Nennlast für den Förderer (20) entspricht.
  7. Vorrichtung (30) nach einem der Ansprüche 5 bis 6, wobei die Steuerung (40) erlaubt, dass der regenerative Antrieb (36) während eines Anfahrvorgangs, wenn die Bewegungsrichtung aufwärts verläuft und sich der Personenförderer (20) mit einer Geschwindigkeit unterhalb einer gewählten Schwellenwertgeschwindigkeit bewegt, zwischen die Leistungsquelle (34) und den Motor (32) geschaltet wird, und die Steuerung (40) andernfalls den regenerativen Antrieb (36) von der Leistungsquelle trennt (34), wenn die Bewegungsrichtung aufwärts verläuft.
  8. Verfahren zum Regeln der Leistung in Zusammenhang mit einem Personenförderermotor (32), das die folgenden Schritte umfasst:
    Erzeugen von Elektrizität vom Motor (32), wenn sich der Personenförderer (20) bewegt;
    Ermöglichen des Bereitstellens der Elektrizität an eine Leistungsquelle (34) durch einen regenerativen Antrieb (36); und
    Bestimmen, wann eine Betriebsbedingung des regenerativen Antriebs (36) außerhalb eines gewünschten Bereichs liegt und darauf reagierend Verhindern, dass der regenerative Antrieb (36) das Bereitstellen der Elektrizität an die Leistungsquelle (34) ermöglicht,
    gekennzeichnet durch
    Steuern eines Umgehungsschalters (44), um zu erlauben oder zu verhindern, dass der regenerative Antrieb (36) das Bereitstellen der Elektrizität an die Leistungsquelle (34) ermöglicht, wobei der Umgehungsschalter (44) zwischen dem regenerativen Antrieb (36) und der Leistungsquelle (34) bereitgestellt ist.
  9. Verfahren nach Anspruch 8, wobei die Betriebsbedingung einen Strom umfasst und das Verfahren Bestimmen umfasst, wann der Strom einen Schwellenwert überschreitet, und/oder wobei die Betriebsbedingung eine Temperatur umfasst und das Verfahren Bestimmen umfasst, wann die Temperatur einen Schwellenwert überschreitet, wobei es insbesondere einen Kühlkörper (48) im Zusammenhang mit dem regenerativen Antrieb (36) gibt und das Verfahren Erfassen der Temperatur am Kühlkörper (48) umfasst.
  10. Verfahren nach Anspruch 8, umfassend das Steuern, ob der regenerative Antrieb (36) das Bereitstellen der Elektrizität an die Leistungsquelle (34) abhängig von einer Bewegungsrichtung des Personenförderers (20) ermöglicht, insbesondere umfassend das Erlauben, dass der regenerative Antrieb (36) das Bereitstellen der Elektrizität an die Leistungsquelle (34) ermöglicht, wenn die Bewegungsrichtung abwärts verläuft und die Betriebsbedingung innerhalb des gewünschten Bereichs liegt, insbesondere wobei der gewünschte Bereich der Betriebsbedingung einer Last am Personenförderer (20) zwischen etwa 30 % und etwa 70 % einer vollen Nennlast für den Förderer (20) liegt.
  11. Verfahren nach Anspruch 10, umfassend
    Erlauben, dass der regenerative Antrieb (36) während eines Anfahrvorgangs, wenn die Bewegungsrichtung aufwärts verläuft und sich der Personenförderer (20) mit einer Geschwindigkeit unterhalb einer gewählten Schwellenwertgeschwindigkeit bewegt, zwischen die Leistungsquelle (34) und den Motor (32) geschaltet wird, und
    andernfalls Trennen des regenerativen Antriebs (36) von der Leistungsquelle (34), wenn die Bewegungsrichtung aufwärts verläuft.
  12. Personenförderer (20), der Folgendes umfasst:
    eine Vielzahl von Stufen (22);
    einen Motor (32) in Zusammenhang mit den Stufen, um die Stufen (22) selektiv zu bewegen;
    einen regenerativen Antrieb (36), der dazu konfiguriert ist, das Bereitstellen von Elektrizität, die vom Motor (32) erzeugt wird, an eine Leistungsquelle (34) zu ermöglichen, wenn sich die Stufen bewegen;
    eine Steuerung (40), die bestimmt, wann mindestens eines von einem Strom oder einer Temperatur des regenerativen Antriebs außerhalb eines gewünschten Bereichs liegt und darauf reagierend verhindert, dass der regenerative Antrieb das Bereitstellen der Elektrizität an die Leistungsquelle ermöglicht; und
    dadurch gekennzeichnet, dass er ferner Folgendes umfasst:
    einen Umgehungsschalter (44) zwischen dem regenerativen Antrieb (36) und der Leistungsquelle (34) und wobei die Steuerung (30) den Umgehungsschalter (44) steuert, um zu erlauben oder zu verhindern, dass der regenerative Antrieb das Bereitstellen von Elektrizität an die Leistungsquelle (34) ermöglicht.
EP10860709.4A 2010-12-17 2010-12-17 Regenerative leistungsregelung für personenförderer Active EP2651811B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2010/060906 WO2012082134A1 (en) 2010-12-17 2010-12-17 Regenerative power control for passenger conveyors

Publications (3)

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EP2651811A1 EP2651811A1 (de) 2013-10-23
EP2651811A4 EP2651811A4 (de) 2017-12-13
EP2651811B1 true EP2651811B1 (de) 2020-05-20

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US (1) US8973731B2 (de)
EP (1) EP2651811B1 (de)
JP (1) JP6355337B2 (de)
KR (1) KR101548247B1 (de)
CN (1) CN103237751B (de)
BR (1) BR112013012089B1 (de)
RU (1) RU2539624C1 (de)
WO (1) WO2012082134A1 (de)

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EP3812333A1 (de) * 2019-10-23 2021-04-28 KONE Corporation Überwachungsanordnung und -verfahren für personenförderer
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Also Published As

Publication number Publication date
CN103237751A (zh) 2013-08-07
WO2012082134A1 (en) 2012-06-21
EP2651811A4 (de) 2017-12-13
US8973731B2 (en) 2015-03-10
HK1187881A1 (en) 2014-04-17
JP2014501210A (ja) 2014-01-20
BR112013012089B1 (pt) 2020-03-10
RU2539624C1 (ru) 2015-01-20
US20130270061A1 (en) 2013-10-17
JP6355337B2 (ja) 2018-07-11
KR20130116303A (ko) 2013-10-23
BR112013012089A2 (pt) 2016-08-16
KR101548247B1 (ko) 2015-08-28
CN103237751B (zh) 2015-06-17
EP2651811A1 (de) 2013-10-23

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